Weight Belt for Freediving: What Does It Actually Do? 🤿 #freediving #freedivingtraining

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Can Submarines Stay Down Forever?

New footage shows NASA astronaut Christina Koch training ahead of her Artemis II mission earlier this year. Astronauts use underwater training because the buoyancy of water creates a near-weightless environment where they neither sink nor float, allowing them to rehearse spacewalks and build muscle memory for handling equipment in space. 🎥 @achintyabairat #nasa #christinakoch #space #artemis

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